Although after a few days the GUI crashes on linux as well (segmentation core dump)
I expect that there is not enough computer resources, or errors in reading / writing from the disk.
I GUI works with an uptime of more than 1 month
[The last step, on Wallet create(2. Installing 8bit-qt) doesn't work, it show the message: "destination path '8bit' already exists and is not an empty directory."
cd ~/8bit
qmake
make